#include<iostream>
#include<vector>
#include<queue>
#include<cstring>
#include<cmath>
#include<map>
#include<set>
#include<cstdio>
#include<algorithm>
#define debug(a) cout<<#a<<"="<<a<<endl;
using namespace std;
const int maxn=2e3+1000;
typedef long long LL;
inline LL read(){LL x=0,f=1;char ch=getchar();	while (!isdigit(ch)){if (ch=='-') f=-1;ch=getchar();}while (isdigit(ch)){x=x*10+ch-48;ch=getchar();}
return x*f;}
char str[maxn];
int main(void){
   cin.tie(0);std::ios::sync_with_stdio(false);
   LL t;cin>>t;
   while(t--){
      LL n;cin>>n;
      cin>>(str+1);
      bool flag=1;
      for(LL i=1;i<=n;i++){
          if(str[i]=='0') flag=0;
      }
      if(flag){
          cout<<"DRAW"<<"\n";
          continue;
      }
      else{
          LL res=0;
          for(LL i=1;i<=n;i++){
              if(str[i]!=str[n-i+1]){
                 if(str[i]=='0'){
                    str[i]='1';res++;
                 }
              }
          }
          LL cnt=0;
          for(LL i=1;i<=n;i++){
              if(str[i]=='0') cnt++;
          }
          if(res==0){
            if(cnt==1||cnt%2==0) cout<<"BOB"<<"\n";
            else if(cnt==0) cout<<"DRAW"<<"\n";
			else cout<<"ALICE"<<"\n";
          }
          else {
            if(cnt==1&&res==1) cout<<"DRAW"<<"\n";
            else if(cnt==0) cout<<"ALICE"<<"\n";
			else cout<<"ALICE"<<"\n";
          }
      }
   }
   return 0;
}
